/* * Copyright (C) 2006 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.internal.os; import android.app.ActivityManager; import android.app.ActivityThread; import android.app.ApplicationErrorReport; import android.os.Build; import android.os.DeadObjectException; import android.os.Debug; import android.os.IBinder; import android.os.Process; import android.os.SystemProperties; import android.os.Trace; import android.util.Log; import android.util.Slog; import com.android.internal.logging.AndroidConfig; import com.android.server.NetworkManagementSocketTagger; import dalvik.system.VMRuntime; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.lang.reflect.Modifier; import java.util.TimeZone; import java.util.logging.LogManager; import org.apache.harmony.luni.internal.util.TimezoneGetter; /** * Main entry point for runtime initialization. Not for * public consumption. * @hide */ public class RuntimeInit { final static String TAG = "AndroidRuntime"; final static boolean DEBUG = false; /** true if commonInit() has been called */ private static boolean initialized; private static IBinder mApplicationObject; private static volatile boolean mCrashing = false; private static final native void nativeFinishInit(); private static final native void nativeSetExitWithoutCleanup(boolean exitWithoutCleanup); private static int Clog_e(String tag, String msg, Throwable tr) { return Log.printlns(Log.LOG_ID_CRASH, Log.ERROR, tag, msg, tr); } /** * Logs a message when a thread encounters an uncaught exception. By * default, {@link KillApplicationHandler} will terminate this process later, * but apps can override that behavior. */ private static class LoggingHandler implements Thread.UncaughtExceptionHandler { @Override public void uncaughtException(Thread t, Throwable e) { // Don't re-enter if KillApplicationHandler has already run if (mCrashing) return; if (mApplicationObject == null) { // The "FATAL EXCEPTION" string is still used on Android even though // apps can set a custom UncaughtExceptionHandler that renders uncaught // exceptions non-fatal. Clog_e(TAG, "*** FATAL EXCEPTION IN SYSTEM PROCESS: " + t.getName(), e); } else { StringBuilder message = new StringBuilder(); // The "FATAL EXCEPTION" string is still used on Android even though // apps can set a custom UncaughtExceptionHandler that renders uncaught // exceptions non-fatal. message.append("FATAL EXCEPTION: ").append(t.getName()).append("\n"); final String processName = ActivityThread.currentProcessName(); if (processName != null) { message.append("Process: ").append(processName).append(", "); } message.append("PID: ").append(Process.myPid()); Clog_e(TAG, message.toString(), e); } } } /** * Handle application death from an uncaught exception. The framework * catches these for the main threads, so this should only matter for * threads created by applications. Before this method runs, * {@link LoggingHandler} will already have logged details. */ private static class KillApplicationHandler implements Thread.UncaughtExceptionHandler { public void uncaughtException(Thread t, Throwable e) { try { // Don't re-enter -- avoid infinite loops if crash-reporting crashes. if (mCrashing) return; mCrashing = true; // Try to end profiling. If a profiler is running at this point, and we kill the // process (below), the in-memory buffer will be lost. So try to stop, which will // flush the buffer. (This makes method trace profiling useful to debug crashes.) if (ActivityThread.currentActivityThread() != null) { ActivityThread.currentActivityThread().stopProfiling(); } // Bring up crash dialog, wait for it to be dismissed ActivityManager.getService().handleApplicationCrash( mApplicationObject, new ApplicationErrorReport.ParcelableCrashInfo(e)); } catch (Throwable t2) { if (t2 instanceof DeadObjectException) { // System process is dead; ignore } else { try { Clog_e(TAG, "Error reporting crash", t2); } catch (Throwable t3) { // Even Clog_e() fails! Oh well. } } } finally { // Try everything to make sure this process goes away. Process.killProcess(Process.myPid()); System.exit(10); } } } protected static final void commonInit() { if (DEBUG) Slog.d(TAG, "Entered RuntimeInit!"); /* * set handlers; these apply to all threads in the VM. Apps can replace * the default handler, but not the pre handler. */ Thread.setUncaughtExceptionPreHandler(new LoggingHandler()); Thread.setDefaultUncaughtExceptionHandler(new KillApplicationHandler()); /* * Install a TimezoneGetter subclass for ZoneInfo.db */ TimezoneGetter.setInstance(new TimezoneGetter() { @Override public String getId() { return SystemProperties.get("persist.sys.timezone"); } }); TimeZone.setDefault(null); /* * Sets handler for java.util.logging to use Android log facilities. * The odd "new instance-and-then-throw-away" is a mirror of how * the "java.util.logging.config.class" system property works. We * can't use the system property here since the logger has almost * certainly already been initialized. */ LogManager.getLogManager().reset(); new AndroidConfig(); /* * Sets the default HTTP User-Agent used by HttpURLConnection. */ String userAgent = getDefaultUserAgent(); System.setProperty("http.agent", userAgent); /* * Wire socket tagging to traffic stats. */ NetworkManagementSocketTagger.install(); /* * If we're running in an emulator launched with "-trace", put the * VM into emulator trace profiling mode so that the user can hit * F9/F10 at any time to capture traces. This has performance * consequences, so it's not something you want to do always. */ String trace = SystemProperties.get("ro.kernel.android.tracing"); if (trace.equals("1")) { Slog.i(TAG, "NOTE: emulator trace profiling enabled"); Debug.enableEmulatorTraceOutput(); } initialized = true; } /** * Returns an HTTP user agent of the form * "Dalvik/1.1.0 (Linux; U; Android Eclair Build/MASTER)". */ private static String getDefaultUserAgent() { StringBuilder result = new StringBuilder(64); result.append("Dalvik/"); result.append(System.getProperty("java.vm.version")); // such as 1.1.0 result.append(" (Linux; U; Android "); String version = Build.VERSION.RELEASE; // "1.0" or "3.4b5" result.append(version.length() > 0 ? version : "1.0"); // add the model for the release build if ("REL".equals(Build.VERSION.CODENAME)) { String model = Build.MODEL; if (model.length() > 0) { result.append("; "); result.append(model); } } String id = Build.ID; // "MASTER" or "M4-rc20" if (id.length() > 0) { result.append(" Build/"); result.append(id); } result.append(")"); return result.toString(); } /** * Invokes a static "main(argv[]) method on class "className". * Converts various failing exceptions into RuntimeExceptions, with * the assumption that they will then cause the VM instance to exit. * * @param className Fully-qualified class name * @param argv Argument vector for main() * @param classLoader the classLoader to load {@className} with */ private static Runnable findStaticMain(String className, String[] argv, ClassLoader classLoader) { Class cl; try { cl = Class.forName(className, true, classLoader); } catch (ClassNotFoundException ex) { throw new RuntimeException( "Missing class when invoking static main " + className, ex); } Method m; try { m = cl.getMethod("main", new Class[] { String[].class }); } catch (NoSuchMethodException ex) { throw new RuntimeException( "Missing static main on " + className, ex); } catch (SecurityException ex) { throw new RuntimeException( "Problem getting static main on " + className, ex); } int modifiers = m.getModifiers(); if (! (Modifier.isStatic(modifiers) && Modifier.isPublic(modifiers))) { throw new RuntimeException( "Main method is not public and static on " + className); } /* * This throw gets caught in ZygoteInit.main(), which responds * by invoking the exception's run() method. This arrangement * clears up all the stack frames that were required in setting * up the process. */ return new MethodAndArgsCaller(m, argv); } public static final void main(String[] argv) { enableDdms(); if (argv.length == 2 && argv[1].equals("application")) { if (DEBUG) Slog.d(TAG, "RuntimeInit: Starting application"); redirectLogStreams(); } else { if (DEBUG) Slog.d(TAG, "RuntimeInit: Starting tool"); } commonInit(); /* * Now that we're running in interpreted code, call back into native code * to run the system. */ nativeFinishInit(); if (DEBUG) Slog.d(TAG, "Leaving RuntimeInit!"); } protected static Runnable applicationInit(int targetSdkVersion, String[] argv, ClassLoader classLoader) { // If the application calls System.exit(), terminate the process // immediately without running any shutdown hooks. It is not possible to // shutdown an Android application gracefully. Among other things, the // Android runtime shutdown hooks close the Binder driver, which can cause // leftover running threads to crash before the process actually exits. nativeSetExitWithoutCleanup(true); // We want to be fairly aggressive about heap utilization, to avoid // holding on to a lot of memory that isn't needed. VMRuntime.getRuntime().setTargetHeapUtilization(0.75f); VMRuntime.getRuntime().setTargetSdkVersion(targetSdkVersion); final Arguments args = new Arguments(argv); // The end of of the RuntimeInit event (see #zygoteInit). Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER); // Remaining arguments are passed to the start class's static main return findStaticMain(args.startClass, args.startArgs, classLoader); } /** * Redirect System.out and System.err to the Android log. */ public static void redirectLogStreams() { System.out.close(); System.setOut(new AndroidPrintStream(Log.INFO, "System.out")); System.err.close(); System.setErr(new AndroidPrintStream(Log.WARN, "System.err")); } /** * Report a serious error in the current process. May or may not cause * the process to terminate (depends on system settings). * * @param tag to record with the error * @param t exception describing the error site and conditions */ public static void wtf(String tag, Throwable t, boolean system) { try { if (ActivityManager.getService().handleApplicationWtf( mApplicationObject, tag, system, new ApplicationErrorReport.ParcelableCrashInfo(t))) { // The Activity Manager has already written us off -- now exit. Process.killProcess(Process.myPid()); System.exit(10); } } catch (Throwable t2) { if (t2 instanceof DeadObjectException) { // System process is dead; ignore } else { Slog.e(TAG, "Error reporting WTF", t2); Slog.e(TAG, "Original WTF:", t); } } } /** * Set the object identifying this application/process, for reporting VM * errors. */ public static final void setApplicationObject(IBinder app) { mApplicationObject = app; } public static final IBinder getApplicationObject() { return mApplicationObject; } /** * Enable DDMS. */ static final void enableDdms() { // Register handlers for DDM messages. android.ddm.DdmRegister.registerHandlers(); } /** * Handles argument parsing for args related to the runtime. * * Current recognized args: * */ static class Arguments { /** first non-option argument */ String startClass; /** all following arguments */ String[] startArgs; /** * Constructs instance and parses args * @param args runtime command-line args * @throws IllegalArgumentException */ Arguments(String args[]) throws IllegalArgumentException { parseArgs(args); } /** * Parses the commandline arguments intended for the Runtime. */ private void parseArgs(String args[]) throws IllegalArgumentException { int curArg = 0; for (; curArg < args.length; curArg++) { String arg = args[curArg]; if (arg.equals("--")) { curArg++; break; } else if (!arg.startsWith("--")) { break; } } if (curArg == args.length) { throw new IllegalArgumentException("Missing classname argument to RuntimeInit!"); } startClass = args[curArg++]; startArgs = new String[args.length - curArg]; System.arraycopy(args, curArg, startArgs, 0, startArgs.length); } } /** * Helper class which holds a method and arguments and can call them. This is used as part of * a trampoline to get rid of the initial process setup stack frames. */ static class MethodAndArgsCaller implements Runnable { /** method to call */ private final Method mMethod; /** argument array */ private final String[] mArgs; public MethodAndArgsCaller(Method method, String[] args) { mMethod = method; mArgs = args; } public void run() { try { mMethod.invoke(null, new Object[] { mArgs }); } catch (IllegalAccessException ex) { throw new RuntimeException(ex); } catch (InvocationTargetException ex) { Throwable cause = ex.getCause(); if (cause instanceof RuntimeException) { throw (RuntimeException) cause; } else if (cause instanceof Error) { throw (Error) cause; } throw new RuntimeException(ex); } } } }